Here are guidelines for some of the most commonly researched peptides: BPC-157 typically comes in 5 mg or 10 mg vials
Our research library covers it properly, including the studies that found increased slow-wave sleep and the ones that found no effect or the opposite, and I would rather send you there than summarise a split literature in a paragraph on a product page
Minor injury: 24 weeks at 250500 mcg/day Severe injury or surgery: 46 weeks, up to 1,000 mcg/day Gut repair: 46 weeks oral or SubQ Neurological support: 48 weeks Response time varies, and there is not enough high-quality human evidence to promise improvement within a specific number of days, especially in pain reduction and mobility
doi: 10.1016/j.clinbiochem.2012.01.016
[1] In practice, 1 mL (which provides the full 100 mg of B and B, etc.) is a common dose for general supplementation in deficient states, but clinicians may start with lower volumes for mild deficiencies or in smaller patients